Home / 20,511.19-28,305.45-11,079.75

Finding the Fourth Proportional to 20,511.19, 28,305.45 and 11,079.75

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Solution

The fourth proportional to 20,511.19, 28,305.45 and 11,079.75 is: 15,290.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.19 : 28,305.45 = 11,079.75 : x
  2. Step 2: Convert to fraction form
    20,511.19/28,305.45 = 11,079.75/x
  3. Step 3: Cross multiply
    20,511.19x = 28,305.45 × 11,079.75
  4. Step 4: Simplify right side
    20,511.19x = 313,617,309.64
  5. Step 5: Solve for x
    x = 313,617,309.64/20,511.19
  6. Step 6: Final answer
    x = 15,290.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.